Cecil,
That looks like a very good idea. I thnk you are correct you should have done this a month or more ago. Learn by doing.
Actually I really wanted to but I had such a painful case of tennis elbow there was no way up until now I could rake the weeds out of the pond before positioning the net. Next year 3.2 oz. of Whitecap per 1/10th acre pond and I shouldn't have to deal with the pondweed!
Any idea how long the net can handle being in the water Bill?